chore: gitignore stray .mvn/ directory

[klobuczek]

Ignores the stray .mvn/ directory (a Maven artifact, unused by this pure-Ruby gem) so it can't be accidentally git added.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Updated project ignore rules to exclude Maven-related artifacts.
  • Clarified that the project uses a pure-Ruby setup rather than Maven.

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No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 78e3cf67-a062-46bd-accb-db5b0cb3ee4c

📥 Commits

Reviewing files that changed from the base of the PR and between f6b9a0e and 3c18ba2.

📒 Files selected for processing (1)

• .gitignore

Included review availability: Your plan includes up to 4 reviews per rolling hour; 3 remain after this review.

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📝 Walkthrough

Walkthrough

The .gitignore file adds a Maven section. The section documents that Maven is not used and ignores the .mvn/ directory.

Changes

Maven ignore configuration

Layer / File(s)	Summary
Add Maven artifact exclusions .gitignore	The ignore rules document that Maven is not used by the pure-Ruby gem and exclude the .mvn/ directory.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to 3c18b

This localized change only prevents the unused .mvn/ directory from being accidentally committed; no actionable merge-blocking risk remains beyond normal checks and review.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the addition of .mvn/ to .gitignore, which is the main change.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ignore-mvn

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